remove free shipping, when coupon applied on cart. woocommerce

disable-free-shipping-on-coupon.php

<?php

add_filter( 'woocommerce_package_rates', 'woocommerce_package_rates_remove_free', 1000 );
 
function woocommerce_package_rates_remove_free( $rates ) {
    // MahdiY.IR
    
    foreach ( $rates as $rate_id => $rate )
        if ( 'free_shipping' === $rate->method_id
		   && count( wc()->cart->get_applied_coupons() ) )  {
			unset( $rates[ $rate_id ] );
        }
	
    return $rates;
}